JPH0430142U

JPH0430142U -

Info

Publication number: JPH0430142U
Application number: JP7103890U
Authority: JP
Priority date: 1990-07-05
Filing date: 1990-07-05
Publication date: 1992-03-11

Description

[Brief explanation of drawings]

第１図乃至第３図は、開いた状態の本案の実施
例を示す斜視図、閉じた状態の平面図および開い
た状態の側面図である。Ａ……マンホール内落下防止仮蓋装置、１……
嵌込外枠、２……中仕切枠、３……出入口、４…
…出入用金網蓋、５ａ，５ｂ，５ｃ，１３ａ，１
３ｂ……ヒンジ、６，７……縁枠部、８，１５，
１６，１７……金網、９……換気扇挿入口、１０
，１１……並行口枠、１２……換気扇挿入口、１
４……囲繞縁枠、１８……持手、１９ａ，１９ｂ
，１９ｃ，２０……係止突片。 1 to 3 are a perspective view showing the embodiment of the present invention in an open state, a plan view in a closed state, and a side view in an open state. A...Temporary cover device for preventing falls inside manholes, 1...
Fitted outer frame, 2... Inner partition frame, 3... Entrance/exit, 4...
...wire mesh lid for access, 5a, 5b, 5c, 13a, 1
3b... Hinge, 6, 7... Edge frame portion, 8, 15,
16, 17...wire mesh, 9...ventilation fan insertion port, 10
, 11... Parallel opening frame, 12... Ventilation fan insertion port, 1
4... Surrounding edge frame, 18... Handle, 19a, 19b
, 19c, 20... Locking protrusion piece.

Claims

[Scope of utility model registration request]

Inside the fitting outer frame that can be freely fitted into the manhole opening, an entrance/exit large enough for a person to enter and exit is divided on one side by a partition frame, and a wire mesh lid for entrance/exit that closes the entrance/exit is slid into the partition frame. While freely hinged, the wire mesh lid for the ventilation fan that closes the ventilation fan insertion port divided at the required location on the other side is hinged freely, and the remaining area other than the ventilation fan insertion port is covered with wire mesh. Features a temporary cover device to prevent falls inside manholes.